May weather forecast
Kumamoto, Japan

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Weather in May

May in Kumamoto experiences a considerable jump in temperature reaching a high of 23.2°C (73.8°F) and going down to 14.3°C (57.7°F). With summer knocking at the doorstep, the city feels the warmth in the air. More hours under the sun add to the prevailing warmth and while rain does arrive, it's minimal and fails to bring much cooling. Expect a steady rise in humidity and a spike in the city's UV index tally. As May gives way to June, anticipate higher temperature readings and frequent showers.

Temperature

May sees a marginal temperature increase, moving from an enjoyable 18.3°C (64.9°F) in April to a moderately hot 23.2°C (73.8°F). Throughout May, Kumamoto witnesses a nighttime temperature average of 14.3°C (57.7°F).

Humidity

The average relative humidity in May in Kumamoto is 73%.

Rainfall

In Kumamoto, Japan, in May, it is raining for 12 days, with typically 78mm (3.07") of accumulated precipitation. In Kumamoto, during the entire year, the rain falls for 179.9 days and collects up to 1028mm (40.47") of precipitation.

Snowfall

In Kumamoto, snow does not fall in April through November.

Sea temperature

In Kumamoto, Japan, the average seawater temperature in May is 21°C (69.8°F).
Note: Most people do not find swimming enjoyable in water of 21°C (69.8°F). The task of controlling breathing becomes tougher as the temperature drops from 21°C (69.8°F) to 15°C (59°F).

Daylight

In May, the average length of the day in Kumamoto is 13h and 51min.
On the first day of May in Kumamoto, sunrise is at 05:29 and sunset at 18:58. On the last day of the month, sunrise is at 05:10 and sunset at 19:19 JST.

Sunshine

In Kumamoto, Japan, the average sunshine in May is 9.5h.

UV index

The average daily maximum UV index in May in Kumamoto is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: A daily maximum UV index of 5 in May translates into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

What is the average May temperature in Kumamoto?

In Kumamoto, 23.2°C (73.8°F) is the average high-temperature and 14.3°C (57.7°F) is the average low-temperature during May.

What is the average humidity in May in Kumamoto?

The average relative humidity in May in Kumamoto, Japan, is 73%.

How much does it rain in Kumamoto in May?

In May, the rain falls for 12 days. Throughout May, 78mm (3.07") of precipitation is accumulated.

When it does not snow in Kumamoto?

April through November are months without snowfall in Kumamoto.

What is the sea temperature in May in Kumamoto?

In May, the average sea temperature is 21°C (69.8°F). For swimming, a surface water temperature of 21°C (69.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Kumamoto have in May?

In May, the average day length in Kumamoto, Japan, is 13h and 51min.

When are sunrise and sunset in May in Kumamoto?

On the first day of May in Kumamoto, Japan, sunrise is at 05:29 and sunset at 18:58. On the last day of the month, sunrise is at 05:10 and sunset at 19:19 JST.

How long on average sun shines in May in Kumamoto?

In Kumamoto, the average sunshine duration in May is 9.5h.

What is the UV index intensity in May in Kumamoto?

In May, the average daily maximum UV index in Kumamoto is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Kumamoto, Japan

Average temperature in May - Kumamoto, Japan
  • Average high temperature in May: 23.2°C

The warmest month (with the highest average high temperature) is August (30.4°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in May: 14.3°C

The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).

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Average pressure in May
Kumamoto, Japan

Average pressure in May - Kumamoto, Japan
  • Average pressure in May: 1012.1mbar

The month with the highest atmospheric pressure is January (1021.8mbar).
The month with the lowest atmospheric pressure is June (1008.2mbar).

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Average wind speed in May
Kumamoto, Japan

Average wind speed in May - Kumamoto, Japan
  • Average wind speed in May: 7.2km/h

The windiest month (with the highest average wind speed) is March (8.7km/h).
The calmest month (with the lowest average wind speed) is June (7km/h).

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Average humidity in May
Kumamoto, Japan

Average humidity in May - Kumamoto, Japan
  • Average humidity in May: 73%

The month with the highest relative humidity is July (83%).
The months with the lowest relative humidity are March and April (72%).

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Average rainfall in May
Kumamoto, Japan

Average rainfall in May - Kumamoto, Japan
  • Average rainfall in May: 78mm

The wettest month (with the highest rainfall) is June (216mm).
The driest month (with the least rainfall) is January (36mm).

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Average rainfall days in May
Kumamoto, Japan

Average rainfall days in May - Kumamoto, Japan
  • Average rainfall days in May: 12 days

The month with the highest number of rainy days is July (23.4 days).
The month with the least rainy days is January (10.5 days).

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Average snowfall in May
Kumamoto, Japan

Average snowfall in May - Kumamoto, Japan
  • Average snowfall in May: 0mm

The month with the highest snowfall is January (16mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in May
Kumamoto, Japan

Average snowfall days in May - Kumamoto, Japan
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in May
Kumamoto, Japan

Average sea temperature in May - Kumamoto, Japan
  • Average sea temperature in May: 21°C

The best month for swimming (with the highest average sea temperature) is August (28°C).
The coldest months (with the lowest average sea temperature) are February and March (18°C).

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Average daylight in May /
Average sunshine in May
Kumamoto, Japan

Average daylight in May / Average sunshine in May - Kumamoto, Japan
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in May: 9h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

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Average sunshine days in May
Kumamoto, Japan

Average sunshine days in May - Kumamoto, Japan
  • Average sunshine days in May: 17 days

The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is July (4.9 days).

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Average UV index in May
Kumamoto, Japan

Average UV index in May - Kumamoto, Japan
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in May
Kumamoto, Japan

Average cloud cover in May - Kumamoto, Japan
  • Average cloud cover in May: 35

The month with the most cloud cover is June (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 31).

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Average visibility in May
Kumamoto, Japan

Average visibility in May - Kumamoto, Japan
  • Average visibility in May: 9km

The month with the highest visibility is November (10km).
The months with the lowest visibility are June and July (8km).

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Kumamoto, Japan

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